Understand Your Home's Runoff

Rainwater on Your Property

As our area grows, where there was once land covered by mostly forest, we now have hard surfaces such as roofs, asphalt, and pavement. When rain falls on these hard surfaces, it cannot soak into the ground so it quickly becomes runoff that can cause flooding in our streets and homes.

Rainwater picks up what it touches on your property, like oil from the road, yard chemicals, and pet waste. This unfiltered, polluted water runs into our storm drain systems and flows into our streams, lakes, and Puget Sound. This polluted water can be highly toxic to our fish and wildlife.

Help rainwater soak into the soil where you live! 

Select tabs below to understand runoff around your site.

  1. Roofs
  2. Decks & Stairs
  3. Walkways & Patios
  4. Driveways & Parking Areas
  5. Soils, Yards & Slopes

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Your roof likely generates the most runoff from your home. While the majority of roofs are outfitted with gutters and downspouts, some are not. Regardless of which system you use, all eaves and downspouts should be routed away from sensitive areas such as septic system drain fields, slopes and building foundations.

Roof information

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